Apt is not working.

Hi, all. I Cannot install any package in the server, As I am newbie in Server. In Morning I found that some, I am not able to install any package from command line in the server,Now every package is now manually downloaded packages and then installed in the server. Can any one in the forum tell me what is the issue and how could I resolve this issue.
I have tried to fix this issue by upgrading & updating Server, But did not worked, Below are the details of my server :-

note: as your log shows, there is a conflict with libgtk, which might be not a genuine package , but installed by an extra archive like ppa.
note2: you need to pay attention at your locale settings https://help.ubuntu.com/community/Locale

note: as your log shows, there is a conflict with libgtk, which might be not a genuine package , but installed by an extra archive like ppa.
note2: you need to pay attention at your locale settings https://help.ubuntu.com/community/Locale